EP 2089452 B1 20120711 - PROCESS FOR OBTAINING INCREASED MOLECULAR WEIGHT OF A POLYMER AND THE USE OF SAID POLYMER
Title (en)
PROCESS FOR OBTAINING INCREASED MOLECULAR WEIGHT OF A POLYMER AND THE USE OF SAID POLYMER
Title (de)
VERFAHREN ZUM ERHALT EINES ERHÖHTEN MOLEKULARGEWICHTS EINES POLYMERS UND VERWENDUNG DES POLYMERS
Title (fr)
PROCÉDÉ SERVANT À OBTENIR UN POIDS MOLÉCULAIRE ACCRU D'UN POLYMÈRE ET UTILISATION DUDIT POLYMÈRE
Publication
Application
Priority
- SE 2007001076 W 20071203
- SE 0602588 A 20061204
Abstract (en)
[origin: WO2008069725A1] The present invention refers to a process for producing a polycarbonate diol, triol or polyol with increased molecular weight. The process comprises transesterification between a diol, triol or polyol and a carbon dioxide source in the presence of a transesterification catalyst, evaporation of formed alcohol by for instance distillation, polymerisation and further polymerisation by addition of an oligocarbonate diol, triol or polyol, whereby a polycarbonate diol, triol or polyol with an average molecular weight of at least 1000 g/mol is obtained, hi a further aspect, the use of a polycarbonate diol, triol or polyol obtained by the process as a building block in thermoplastic polyesters and polyurethanes is disclosed.
IPC 8 full level
C08G 64/30 (2006.01); C08L 69/00 (2006.01)
CPC (source: EP SE)
C08G 18/44 (2013.01 - EP); C08G 63/64 (2013.01 - EP); C08G 64/30 (2013.01 - SE); C08G 64/305 (2013.01 - EP)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2008069725 A1 20080612; EP 2089452 A1 20090819; EP 2089452 A4 20100203; EP 2089452 B1 20120711; EP 2089452 B8 20120926; SE 0602588 L 20080605; SE 531577 C2 20090526
DOCDB simple family (application)
SE 2007001076 W 20071203; EP 07852082 A 20071203; SE 0602588 A 20061204